# Re: Spherical boundary for USRBDX?

From: Bertrand H. Biritz <beb2015_at_med.cornell.edu>
Date: Thu, 10 Mar 2011 11:08:09 -0500

Dear FLUKA members,

I have a hopefully brief follow up question. Using USRYIELD I can have the fluence
as a function of energy and polar angle. If I use USRBDX I can have it as a function
of energy and steradian. Is there a way to give me the fluence as a function of energy,
polar and azimuthal angle? How would one go about measuring the fluence as a
function of energy 360 degrees around a target?

A simplified setup of the simulation I am running is: I have a tungsten
target being hit by an electron beam. This target is inside of a shielding
rectangle (13.4 by 13.3 by 10 cm, x, y and z respectively) with the z
end having an opening bore to allow the beam in. How would I go about measuring
the fluence escaping the shielding in all directions? Perhaps the idea of being
able to say what the fluence is for a particular bin in E, theta, phi is the wrong

Sincerely,
Bertrand

P.S. I included the email I had sent to Alberto, when I replied I forgot to
include the fluka-discuss email address

On Mar 4, 2011, at 10:26 AM, Bertrand H.J. Biritz wrote:

> Dear Alberto,
>
> Thank you for the very helpful reply.
>
> Hehe, for some reason I was not thinking right about the photon kinetic energy. Since it is T = E-m and the mass is 0 then T = E, d'uh.
>
> Have a relaxing weekend,
> Bertrand
>
> P.S. Sorry that the .png attachment came out as text, I will try and figure out how to do it properly the next time.
Received on Fri Mar 11 2011 - 15:56:57 CET

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